<!DOCTYPE HTML>
<html>
<head>
    <meta charset="utf-8">
    <title></title>
    <style type="text/css">
body,html { color:black; background:white; font-size:12px; padding:0; margin:0; }

.grid1, .grid2 {
  block-size: 60px;
  border: 2px solid green;
  position: relative;
}

.grid2 {
  border-width: 20px;
}

span {
  position: absolute;
  background: lime;
  border: 1px solid black;
  box-sizing: border-box;
}

.a {
  offset-inline-start: 40px;
  offset-block-start: 0px;
  inline-size: 60px;
  block-size: 40px;
}
.b {
  offset-inline-start: 20px;
  offset-block-start: 40px;
  inline-size: 60px;
  block-size: 20px;
}
.c {
  offset-inline-start: 80px;
  offset-block-start: 40px;
  inline-size: 60px;
  block-size: 20px;
}
.d {
  offset-inline-start: 0px;
  offset-block-start: 0px;
  inline-size: 20px;
  block-size: 60px;
}
    </style>
</head>
<body dir=rtl>

<div class=grid1>
<span class="a">a</span>
<span class="b">b</span>
<span class="c">c</span>
<span class="d">d</span>
</div>

<div class=grid2>
<span class="a">a</span>
<span class="b">b</span>
<span class="c">c</span>
<span class="d">d</span>
</div>

</body>
</html>
